Im selling my passport because i need the money but i figured i can get a classic for 0 down. What does Link backup? Certain things or everything?

I want all my remember tasks and notes to transfer, as well as the calendar and whatnot.

IMHO: BB Link will only keep contacts for transfer from Passport to Classic. For everything else--Remember, SMS/MMS, Calendar, etc, use Ultimate Backup for BlackBerry 10, instead. Much easier and saver t hat way, since you can keep the backup on SD Card (or any medium, for that matter). I use this every time I update/downgrade the OS.